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replace listener config option IPsNATed with NATIPs, and let autotls check NATIPs

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NATIPs lists the public IPs, so we can still do the DNS checks on them. with
IPsNATed, we disabled the checks.

based on feedback by kikoreis in issue #52
This commit is contained in:
Mechiel Lukkien
2023-08-11 10:13:17 +02:00
parent d7df70acd8
commit 55d05c6bea
6 changed files with 82 additions and 19 deletions
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46
webadmin/admin.go
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@ -455,13 +455,19 @@ func checkDomain(ctx context.Context, resolver dns.Resolver, dialer *net.Dialer,
}
}
// If at least one listener with SMTP enabled has specified NATed IPs, we'll skip
// If at least one listener with SMTP enabled has unspecified NATed IPs, we'll skip
// some checks related to these IPs.
var isNAT bool
var isNAT, isUnspecifiedNAT bool
for _, l := range mox.Conf.Static.Listeners {
if l.IPsNATed && l.SMTP.Enabled {
if !l.SMTP.Enabled {
continue
}
if l.IPsNATed {
isUnspecifiedNAT = true
isNAT = true
}
if len(l.NATIPs) > 0 {
isNAT = true
break
}
}
@ -473,16 +479,17 @@ func checkDomain(ctx context.Context, resolver dns.Resolver, dialer *net.Dialer,
defer logPanic(ctx)
defer wg.Done()
// For each mox.Conf.SpecifiedSMTPListenIPs, and each address for
// For each mox.Conf.SpecifiedSMTPListenIPs and all NATIPs, and each IP for
// mox.Conf.HostnameDomain, check if they resolve back to the host name.
hostIPs := map[dns.Domain][]net.IP{}
ips, err := resolver.LookupIP(ctx, "ip", mox.Conf.Static.HostnameDomain.ASCII+".")
if err != nil {
addf(&r.IPRev.Errors, "Looking up IPs for hostname: %s", err)
}
if !isNAT {
gatherMoreIPs := func(publicIPs []net.IP) {
nextip:
for _, ip := range mox.Conf.Static.SpecifiedSMTPListenIPs {
for _, ip := range publicIPs {
for _, xip := range ips {
if ip.Equal(xip) {
continue nextip
@ -491,6 +498,19 @@ func checkDomain(ctx context.Context, resolver dns.Resolver, dialer *net.Dialer,
ips = append(ips, ip)
}
}
if !isNAT {
gatherMoreIPs(mox.Conf.Static.SpecifiedSMTPListenIPs)
}
for _, l := range mox.Conf.Static.Listeners {
if !l.SMTP.Enabled {
continue
}
var natips []net.IP
for _, ip := range l.NATIPs {
natips = append(natips, net.ParseIP(ip))
}
gatherMoreIPs(natips)
}
hostIPs[mox.Conf.Static.HostnameDomain] = ips
iplist := func(ips []net.IP) string {
@ -598,7 +618,7 @@ func checkDomain(ctx context.Context, resolver dns.Resolver, dialer *net.Dialer,
addf(&r.MX.Errors, "Looking up IPs for mx host %q: %s", mx.Host, err)
}
r.MX.Records[i].IPs = ips
if isNAT {
if isUnspecifiedNAT {
continue
}
if len(ourIPs) == 0 {
@ -765,7 +785,11 @@ func checkDomain(ctx context.Context, resolver dns.Resolver, dialer *net.Dialer,
if !l.SMTP.Enabled || l.IPsNATed {
continue
}
for _, ipstr := range l.IPs {
ips := l.IPs
if len(l.NATIPs) > 0 {
ips = l.NATIPs
}
for _, ipstr := range ips {
ip := net.ParseIP(ipstr)
checkSPFIP(ip)
}
@ -1135,7 +1159,7 @@ When enabling MTA-STS, or updating a policy, always update the policy first (thr
}
r.Autoconf.IPs = ips
if !isNAT {
if !isUnspecifiedNAT {
if len(ourIPs) == 0 {
addf(&r.Autoconf.Errors, "Autoconfig does not point to one of our IPs.")
} else if len(notOurIPs) > 0 {
@ -1171,7 +1195,7 @@ When enabling MTA-STS, or updating a policy, always update the policy first (thr
}
match = true
r.Autodiscover.Records = append(r.Autodiscover.Records, AutodiscoverSRV{*srv, ips})
if !isNAT {
if !isUnspecifiedNAT {
if len(ourIPs) == 0 {
addf(&r.Autodiscover.Errors, "SRV target %q does not point to our IPs.", srv.Target)
} else if len(notOurIPs) > 0 {